Commitments and Contingencies (Detail Textuals) $ in Thousands	1 Months Ended	12 Months Ended
	Sep. 30, 2012 PRPs	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)
Commitments And Contingencies [Line Items]
Operating leases, rent expense		$ 8,131	$ 7,240	$ 6,958
Number of potentially responsible parties | PRPs	140
Term of employment and severance agreement		up to 15 months
Current and long-term liabilities
Commitments And Contingencies [Line Items]
Accrual for environmental loss contingencies payments		$ 7,024	$ 6,827